Six months ago, a teenager was burned alive in a tiny Mississippi town. Police say they still don’t know who killed her or why, leaving the mystery in the hands of amateur online sleuths who may be doing more harm than good. When does a private tragedy become a public pastime?

With this week’s overhaul of Facebook features, users will need to be extra diligent about who their friends are. It seems that anyone on your friends list can add you to a group. Who knows, you may end up on the North American Man/Boy Love Association. Just ask Mark Zuckerberg!